Pump



Sept. 17, 1940. G. s. SHUPE 2,215,164

PUMP

Filed March 30, 1939 Greek S. ,J'hupe I N VEN TOR.

ATTORNEYS;

Patented Sept. 17, 1940 UNITED STATES PATENT OFFICE PUMI? Greek S. Shupe, Fort Stockton, Tex.

Application March 30, 1939, Serial No. 265,023

3 Claims.

One object of the present invention is to provide a novel pump construction, another object of the invention is to supply novel means for preventing loose objects from dropping into a pump cylinder, and another object of the invention is to provide novel means whereby the pump cylinder and associated parts may be lowered readily into a well casing, locked in the well casing, and removed from the well casing.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed,

without departing from the spirit of the invention.

In the drawing:

Fig. 1 is a longitudinal section showing a device constructed in accordance with the invention;

Figs. 2, 3 and 4 are cross sections taken, respectively, on the lines 2--2, 3-3 and 4-4 of Fig. l.

The numeral l marks a well casing, provided at its lower end with an inwardly extended annular keeper 2, supporting a pump cylinder 3, approximately triangular latches 4 being pivotally mounted at 5 within the lower end of the cylinder 3, for lateral and radial swinging movement, the latches being provided near their upper ends and on their outer edges with inset seats 6, the latches being held engaged with the keeper 2 by a frusto-conical disk I, constituting a wedge, engaging the inclined inner edges of the latches, the combined wedge and weight 1 being secured to the lower end of a stem 8 mounted for vertical reciprocation in a foot valve cage 9, secured within the lower part of the cylinder 3, a downwardly closing check valve l0 being mounted for vertical reciprocation on the stem 8, and being adapted to seat on the valve cage 9, the upper end of the stem 8 projecting above the cage 9, and being threaded as shown at l l.

A piston, denoted generally by the numeral I2 is mounted for reciprocation with respect to the cylinder 3 and includes a tubular body I4 joined at its upper end by an open connection l5 to a sucker rod H5 or other operating means. An

abutment disk I! is threaded on the lower end of the body l4 of the piston I2, within the cylinder 3. Packings l8 are disposed about the piston body M, in slidable contact with the bore of the cylinder 3, the packings being compacted between the abutment disk I! and a jam nut l9 threaded on the piston body l4.

being slidably carried by the cage, and being adapted to close downwardly and seat on the cage.

The piston body I4 reciprocates in a downwardly tapered receiver 26, which is secured to the upper end portion of the cylinder 3 by spaced radial arms 21. At its upper end, the receiver 26 is approximately of the same diameter as the cylinder 3, and trash or detached parts which might otherwise find their way down into the cylinder 3, and effect a scoring of it, are caught by the receiver 26. There is a liberal space 28 between the widest part of the receiver 26 and the cylinder 3.

In order to remove the cylinder 3, the piston I2 is lowered by means of the sucker rod l6, and turned, until the threaded upper end ll of the stem 8 is engaged in the threaded hole 50 in the hub 28 of the abutment disk I! on the piston [4. An upward pull is exerted on the rod l6, and the stem 8 and the wedge I are raised, the wedge or disk 1 moving out of contact with the latches 4. The cylinder 3 now can be raised in the well casing l, and can be pulled out of the well, the part 1 moving upwardly until it comes into contact with the cage 9. The latches 4 are swung inwardly by contact with the part 2. By a reversal of the operation last above described, the cylinder 3 can be lowered into the well, the parts resuming the positions depicted in Fig. 1.

On the upstroke, the valves 24 and 22 are closed. The valve I0 opens, and the piston head I8-l9 l1 pulls liquid into the space below the said piston head structure. On the down-stroke, the foot valve In closes, the valves 24 and 22 open, the water or other liquid is forced upwardly through the tubular piston body l4 and overflows into the upper part of the cylinder 3, above the piston head structure l8--I9l'l. On the next upstroke, the valves 22 and 24 close, and the piston head I8I9-l1, moving upwardly in the cylinder 3, boosts the water out of the upper end of the well casing I.

Having thus described the invention, what is claimed is:

1. In a pump, a casing, a cylinder removably mounted in the casing, latches pivoted to the cylinder and engaged with the casing, the latches being movable inwardly, out of engagement with the casing, a latch-operator movable to a lowered position in which it holds the latches in engagement with the casing, thereby to retain the cylinder in the casing, a cylinder-carried abutment which the latch-operator engages, when it is raised sufficiently, a piston mounted to reciprocate in the cylinder, and interengaging elements on the piston and on the latch-operator, whereby the latch-operator may be raised, first independently of the cylinder, to disengage the latch-operator from the latches, and then to bring the latch-operator. into engagement with the abutment, to bring about an upward removal of the cylinder.

2. In a pump, a casing, a cylinder removably mounted in the casing, casing-engaging latches pivoted to the cylinder, a foot valve cage secured to the cylinder, a latch-operator movable to a lowered position, in which it holds the latches engaged with the casing, thereby to retain the cylinder in the casing, a stem carrying the latchoperator, the stem being slidably mounted in the foot valve cage, a foot valve slidable on the stem and mounted to seat on the foot valve cage, a piston mounted to reciprocate in the cylinder, and interengaging elements on the-piston and on the stem, whereby the latch-operator'may be raised, first independently of the cylinder, to disengage the latch-operator from the latches, and then to bring the latch-operator into engagement with the foot valve cage, thereby to effect an upward removal of the cylinder.

3. In a pump, a casing, a cylinder removably mounted in the casing, casing-engaging latches pivoted to the cylinder, a latch-operator movable to a lowered position in which it holds the latches engaged with the casing, thereby to retain the cylinder in the casing, and means under the control of a workman for moving the latch-operator to and from operative position.

GREEK S. SHUPE. 

